The PHP development group has officially released version 5.5.8 of the PHP language:

The PHP development team announces the immediate availability of PHP 5.5.8. This release fixes about 20 bugs against PHP 5.5.7 components.

There's no critical issues fixed in this release, but - as always - it's recommended that you update. Changes cover a wide range of areas in the language including the Date, DOM, Filter, GD MySQLi, SOAP and Sockets functionality. You can download this latest source version from the downloads page or the Windows binaries. If you'd like to view the full list of fixes and changes, check out the Changelog.